<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			@keyframes mycolor{
				0%{
					width: 100px;
					height: 100px;
				}
				100%{
					width: 500px;
					height: 500px;
				}
			}
			div{
				background: red;
				width: 500px;
				height: 500px;
				animation-name: mycolor;
				animation-duration: 5s;
				animation-timing-function: ease-out;
				float: right;
			}
		</style>
	</head>
	<body>
		<div></div>
	</body>
</html>
